tofsee | f48c21d8ae4946152edbc013645da8f5141b987994b9209ba6017411fddd5c7c

General

Target

5881e379bcd6046860899915114f0d52.exe
Size

11.9MB
MD5

5881e379bcd6046860899915114f0d52
SHA1

0e42cecfebbfd8b29105d541f05c1a2b3c5a3fa4
SHA256

f48c21d8ae4946152edbc013645da8f5141b987994b9209ba6017411fddd5c7c
SHA512

89c4e81f6d89f558596b8818a7fd140bcf47db1bd3e4cc941cb4ed20b1865268ca564bac5fdaab527a4e25e6ae93eadf71a2a604611e613a6e35e9ddbfd36476
SSDEEP

49152:4ckGb2222222222222222222222222222222222222222222222222222222222H:4ck

Score

10^/10

tofsee evasion persistence trojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Creates new service(s) 1 TTPs
persistence

Windows Service
T1543.003

Modifies Windows Firewall 1 TTPs 1 IoCs

evasion

Windows Service

T1543.003

pid	Process
2924	netsh.exe

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\tqynpieg\ImagePath = "C:\\Windows\\SysWOW64\\tqynpieg\\duqxonrv.exe"	svchost.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1815711207-1844170477-3539718864-1000\Control Panel\International\Geo\Nation	5881e379bcd6046860899915114f0d52.exe

Deletes itself 1 IoCs

pid	Process
3164	svchost.exe

Executes dropped EXE 1 IoCs

pid	Process
4488	duqxonrv.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4488 set thread context of 3164	4488	duqxonrv.exe	107

Launches sc.exe 3 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
2464	sc.exe
2816	sc.exe
4468	sc.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
2000	3152	WerFault.exe	87
4528	4488	WerFault.exe	102

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 3152 wrote to memory of 3680	3152	5881e379bcd6046860899915114f0d52.exe	91
PID 3152 wrote to memory of 3680	3152	5881e379bcd6046860899915114f0d52.exe	91
PID 3152 wrote to memory of 3680	3152	5881e379bcd6046860899915114f0d52.exe	91
PID 3152 wrote to memory of 4900	3152	5881e379bcd6046860899915114f0d52.exe	93
PID 3152 wrote to memory of 4900	3152	5881e379bcd6046860899915114f0d52.exe	93
PID 3152 wrote to memory of 4900	3152	5881e379bcd6046860899915114f0d52.exe	93
PID 3152 wrote to memory of 2464	3152	5881e379bcd6046860899915114f0d52.exe	96
PID 3152 wrote to memory of 2464	3152	5881e379bcd6046860899915114f0d52.exe	96
PID 3152 wrote to memory of 2464	3152	5881e379bcd6046860899915114f0d52.exe	96
PID 3152 wrote to memory of 2816	3152	5881e379bcd6046860899915114f0d52.exe	98
PID 3152 wrote to memory of 2816	3152	5881e379bcd6046860899915114f0d52.exe	98
PID 3152 wrote to memory of 2816	3152	5881e379bcd6046860899915114f0d52.exe	98
PID 3152 wrote to memory of 4468	3152	5881e379bcd6046860899915114f0d52.exe	99
PID 3152 wrote to memory of 4468	3152	5881e379bcd6046860899915114f0d52.exe	99
PID 3152 wrote to memory of 4468	3152	5881e379bcd6046860899915114f0d52.exe	99
PID 3152 wrote to memory of 2924	3152	5881e379bcd6046860899915114f0d52.exe	101
PID 3152 wrote to memory of 2924	3152	5881e379bcd6046860899915114f0d52.exe	101
PID 3152 wrote to memory of 2924	3152	5881e379bcd6046860899915114f0d52.exe	101
PID 4488 wrote to memory of 3164	4488	duqxonrv.exe	107
PID 4488 wrote to memory of 3164	4488	duqxonrv.exe	107
PID 4488 wrote to memory of 3164	4488	duqxonrv.exe	107
PID 4488 wrote to memory of 3164	4488	duqxonrv.exe	107
PID 4488 wrote to memory of 3164	4488	duqxonrv.exe	107

C:\Users\Admin\AppData\Local\Temp\5881e379bcd6046860899915114f0d52.exe
"C:\Users\Admin\AppData\Local\Temp\5881e379bcd6046860899915114f0d52.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3152
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tqynpieg\
  2⤵
  PID:3680
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\duqxonrv.exe" C:\Windows\SysWOW64\tqynpieg\
  2⤵
  PID:4900
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create tqynpieg binPath= "C:\Windows\SysWOW64\tqynpieg\duqxonrv.exe /d\"C:\Users\Admin\AppData\Local\Temp\5881e379bcd6046860899915114f0d52.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  - Launches sc.exe
  PID:2464
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description tqynpieg "wifi internet conection"
  2⤵
  - Launches sc.exe
  PID:2816
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start tqynpieg
  2⤵
  - Launches sc.exe
  PID:4468
- C:\Windows\SysWOW64\netsh.exe
  "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
  2⤵
  - Modifies Windows Firewall
  PID:2924
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3152 -s 668
  2⤵
  - Program crash
  PID:2000

C:\Windows\SysWOW64\tqynpieg\duqxonrv.exe
C:\Windows\SysWOW64\tqynpieg\duqxonrv.exe /d"C:\Users\Admin\AppData\Local\Temp\5881e379bcd6046860899915114f0d52.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4488
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Sets service image path in registry
  - Deletes itself
  PID:3164
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4488 -s 516
  2⤵
  - Program crash
  PID:4528

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3152 -ip 3152
1⤵
PID:2012

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 4488 -ip 4488
1⤵
PID:5072

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Create or Modify System Process

2

T1543

Windows Service

2

T1543.003

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\duqxonrv.exe

Filesize
2.2MB

MD5
1054d5c53539875e4f14cb7639c97fc5

SHA1
b561d8d90091a98aaa09d517589de4d35a871219

SHA256
02ff7d9422689b3a75fa69e944775d7c4797ec5b73d837ad1d726718690fb8fc

SHA512
c2960948d6c11a0ad6019ae02d48eb6456e12061e2b8b53b0f35c0992e0187e80d10d3dd2b5c9493b508eaa16fc284d5ff8071e06037c18d140173715b71e4f9

Download Submit
C:\Windows\SysWOW64\tqynpieg\duqxonrv.exe

Filesize
555KB

MD5
668d6b7d7825aa7c5c104ab92f390071

SHA1
f50498251e9a323e27cae6bf38bbe83da949ebc4

SHA256
ed0092cbbb7ad845e121fbcd9e03b5e37d6e9386241cc2b0441a9eb85e9740cb

SHA512
4fd2e122e3e1af34bb7f5efbf04dd589ca91a94ad7a9721afa52b6fa3b3cd7580ee3e08eacc8274c16a68d3d1eb9aa9118d619247e4b6ef078c96899fffee7bb

Download Submit
memory/3152-8-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/3152-3-0x0000000000400000-0x0000000000472000-memory.dmp

Filesize
456KB

Download
memory/3152-2-0x00000000001C0000-0x00000000001D3000-memory.dmp

Filesize
76KB

Download
memory/3152-7-0x0000000000400000-0x0000000000472000-memory.dmp

Filesize
456KB

Download
memory/3152-1-0x0000000000490000-0x0000000000590000-memory.dmp

Filesize
1024KB

Download
memory/3164-12-0x00000000001B0000-0x00000000001C5000-memory.dmp

Filesize
84KB

Download
memory/3164-15-0x00000000001B0000-0x00000000001C5000-memory.dmp

Filesize
84KB

Download
memory/3164-16-0x00000000001B0000-0x00000000001C5000-memory.dmp

Filesize
84KB

Download
memory/3164-18-0x00000000001B0000-0x00000000001C5000-memory.dmp

Filesize
84KB

Download
memory/3164-19-0x00000000001B0000-0x00000000001C5000-memory.dmp

Filesize
84KB

Download
memory/4488-17-0x0000000000400000-0x0000000000472000-memory.dmp

Filesize
456KB

Download
memory/4488-11-0x0000000000400000-0x0000000000472000-memory.dmp

Filesize
456KB

Download
memory/4488-10-0x0000000000670000-0x0000000000770000-memory.dmp

Filesize
1024KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads